Transcript human body systems - Riverdale Middle School

HUMAN BODY SYSTEMS
How Do You Move?
Muscles and bones work together,
making your body move. The nervous
system tells your muscles when to act.
MUSCULAR SYSTEM
• Made of muscles that cause
parts of your body move.
• Skeletal muscles move
bones. Muscles are
attached to bones by
tendons.
• Cardiac muscles make your
heart beat and pump blood
through your body.
• Smooth muscles are found
in many of your organs.
Move food through your
digestive system. Make you
breathe, cough, and sneeze.
• Some muscles work in
pairs. (biceps and triceps)
SKELETAL SYSTEM
• Made of bones and cartilage.
• Supports your body and gives
it shape.
• Protects your internal organs.
• Ligaments hold bones
together.
• Allows you to move when
muscles pull on bones.
• Stores minerals such as
calcium.
• Produces blood cells.
• Two or more bones meet at a
joint. Joints allow different
kinds of movement.
Which Systems Move Materials
in Your Body?
The circulatory, respiratory, digestive,
and excretory systems play key roles
in moving materials in your body.
CIRCULATORY SYSTEM
• Moves blood throughout your
body.
• Blood carries oxygen and
nutrients to all cells.
• Blood removes carbon dioxide
and wastes from cells.
• Helps fight disease – white blood
cells.
• Organs: heart, blood vessels –
arteries, veins, capillaries
RESPIRATORY SYSTEM
• Takes in oxygen from
the air you inhale or
breathe in.
• Gets rid of waste gases
(carbon dioxide and
water vapor) when you
exhale or breathe out.
• Organs: mouth, nose,
trachea, bronchi, lungs
DIGESTIVE SYSTEM
• Breaks down food into
nutrients that your
cells can use.
• Gets rid of solid wastes
from digestion.
• Organs: mouth,
esophagus, stomach,
small intestine, liver,
gall bladder, pancreas,
large intestine, rectum,
and anus
EXCRETORY SYSTEM
• Removes wastes that your
cells produce.
• Liquid wastes and waste
gases are removed from
your body.
• Organs: kidneys, ureters,
bladder, urethra, skin,
lungs.
Which Systems Control Body
Functions?
The nervous system and the
endocrine system work together to
control body functions.
NERVOUS SYSTEM
• Controls all of your
body’s activities. None
of your other systems
would function without
your nervous system.
• Receives information
about your
environment.
• Stores memories.
• Allows you to think.
• Organs: brain, spinal
cord, nerves, sense
organs
ENDOCRINE SYSTEM
• Controls growth,
development, and
energy processes by
releasing chemicals
called hormones.
• Helps maintain
homeostasis.
• Structures: glands
(thyroid, pancreas,
adrenals, pituitary, and
others)